rust/tests/ui/imports/no-std-inject.rs

#![no_std]

extern crate core; //~ ERROR: the name `core` is defined multiple times
extern crate std;

fn main() {}
syntax: Implement #![no_core] This commit is an implementation of [RFC 1184][rfc] which tweaks the behavior of the `#![no_std]` attribute and adds a new `#![no_core]` attribute. The `#![no_std]` attribute now injects `extern crate core` at the top of the crate as well as the libcore prelude into all modules (in the same manner as the standard library's prelude). The `#![no_core]` attribute disables both std and core injection. [rfc]: https://github.com/rust-lang/rfcs/pull/1184 2015-07-30 00:01:14 +00:00			`#![no_std]`

Clearer Error Message for Duplicate Definition Clearer use of the error message and span labels to communicate duplicaiton defitions/imports. New error format: ``` error[E0428]: the name `Foo` is defined twice --> example.rs:2:1 \| 1 \| trait Foo { } \| ------------- previous definition of the trait `Foo` here 2 \| struct Foo { } \| ^^^^^^^^^^^^^^ `Foo` redefined here = note: `Foo` must be defined only once in the type namespace of this module error: aborting due to previous error ``` 2017-05-18 03:29:58 +00:00			extern crate core; //~ ERROR: the name `core` is defined multiple times
syntax: Implement #![no_core] This commit is an implementation of [RFC 1184][rfc] which tweaks the behavior of the `#![no_std]` attribute and adds a new `#![no_core]` attribute. The `#![no_std]` attribute now injects `extern crate core` at the top of the crate as well as the libcore prelude into all modules (in the same manner as the standard library's prelude). The `#![no_core]` attribute disables both std and core injection. [rfc]: https://github.com/rust-lang/rfcs/pull/1184 2015-07-30 00:01:14 +00:00			`extern crate std;`

			`fn main() {}`